The performance of the reversing valve
1)The valve performance
Various control methods of the three cross five general formula and three directional control valve, the valve core in two head position, the mouth of the connect situation according to replace the valve performance of the west. The use of "O" type, "H" type, "P" type, K ", "M", etc.
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Analysis and choice of three directional control valve in a performance, usually consider:
(1) the system pressure P heart block, system pressure, the hydraulic pump used for multi-cylinder system solutions.
2) solution system unloading P smooth and a mouth to mouth are interlinked, unloading system. (H K X M type)
(3) take reversing stable precision of A and B two obstruction, west to occur in commutation process, reversing unsafe, but high precision; A and B of all T mouth mouth, reversing suppress stability, but the precision is low.
(4) to start the valve outside of stability, a hydraulic oil cylinder cavity tank, still has plenty of oil fell slowly blunt, move not smooth.
(5) the hydraulic oil cylinder floating and at the end of the free meaning under the position
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2) the valve of the hydraulic energy
By moving mass flow law of no known, the oil flux work role when reversing valve in the fluid power on the valve core has steady fluid dynamic and transient fluid power two kinds.
(1) the steady-state liquid energy: end of the valve core to move, make fixed before flowing fluid power valve core dynamic qualitative fruit more and interest with no make the valve under the valve core, mouth closed and large force, and valve source quality.
(2) the transient fluid energy: slide valve in the process of moving, the body cavity fluid source due to slow down or speed up and forces acting on the valve core, moving fast degrees.
3) hydraulic assigned
Assigned the fruit: dirt into the into the gap; Warm degrees lower, valve core contracts; But how many what shape and altogether to the cause of the slide valve deputy degree change to v yarn unbalanced radial force, its importance includes:
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A. how many what shape error between the valve core and valve body, shaft mouth line suppress speech but not heavy
B valve core fruit worker error and with no back taper, shaft mouth line suppress speech but not heavy.
C rise no part in the name of valve core
Methods to increase the unbalanced radial force:
1) the progress manufacturing and removing accuracy
2) under the valve core pressure annular groove
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